sullivanjakob
11.09.2019 •
Biology
Skills that are prerequisite for performing a specified behavior are called
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Ответ:
4. a mix of gases
Explanation:
It contains roughly 78% nitrogen and 21% oxygen 0.97% argon and carbon dioxide 0.04% trace amounts of other gases, and water vapor. This mixture of gases is commonly known as air.
hope this helps